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By trying to lift too much weight.
Uh all of your muscles DO work together, when you move or lift things......idiot
Improve your mobility.
stretched or excersised.
A muscle pull happens when muscles are overworked or over stretched
The maid difference between human muscles and insect muscles is the strength that can be obtained from them. When comparing the muscles to the size of the host and how much you can lift or carry, an insect is much stronger than a human is.
It can be, because if your hands are to close together, you are isolating muscles, make it harder to lift. If the weight is distributed over a wider range of muscles, or stronger muscles, the lift is easier.
passive stretching
The shoulder muscles
your muscles burn when you exert yourself because when you lift heavy or lift for an excess ammount of reps you get a build up of lactic acid in your muscles
Impossible to tell, since that will depend on the tone of his muscles.
Pectoral Muscles, Biceps, and Triceps.